Daveyoungana pentacorni, 2019

Domahovski, Alexandre Cruz & Cavichioli, Rodney Ramiro, 2019, Three new species of Daveyoungana Blocker & Webb (Hemiptera: Cicadellidae: Iassinae: Hyalojassini) from Brazil, Zootaxa 4571 (4), pp. 477-488 : 483

Daveyoungana pentacorni sp. nov.

( Figs 36–56 , 61, 62 )

Diagnosis. Ventral process of pygofer ( Figs 42–44 ) extending distad along ventral margin straight, without any process; apex abruptly curved, hook-shaped and acute. Aedeagus ( Figs 48, 49 ) shaft with five apical processes; pair of lateral processes on apical one-fourth, directed dorsally; one short process on anterior surface, near apex of lateral processes; pair of subapical processes on posterior surface, near lateral margins, directed ventrally.

Description. Length 6.7–6.8mm (male), 7.0–7.2mm (female). Head ( Fig. 37 ) with clypeus sexually dimorphic (as mentioned by Dai & Dietrich 2015). Front femur PD row with three sparse long setae. Hind tibial rows PD, AD, and AV with 15–16, 10, and 16–17 macrosetae, respectively, PV row beginning on basal third, setae of median third homogeneous in length and apical third alternating short and long setae and ending in two short setae. Other characters as in the generic diagnosis (Dai & Dietrich 2015).

Coloration. As in the generic diagnosis (Dai & Dietrich 2015).

Male terminalia. Sternite VIII ( Fig. 40 ) with posterolateral margins straight; apex triangular, subacute. Pygofer ( Fig. 41 ), in dorsal view, with inner posterior angles rounded; in lateral view ( Fig. 42 ) with ventral margin slightly expanded ventrally and weakly rounded; posterior margin broadly rounded; ventral process ( Figs 42–44 ) with well developed dorsal and ventral lobe near base; ventral margin straight; apex abruptly curved, hook-shaped and acute; in ventral view, flattened laterally. Subgenital plate ( Fig. 45 ), narrow in ventral view, with numerous setae distributed along posterolateral margin and group of setae on ventral surface, near apical mid-portion; medial and lateral margins straight; posterior margin projected posteriorly at midlength. Connective ( Fig. 46 ) with stem ca. two times longer than arms, strongly broadened apically, posterolateral angels rounded. Style ( Fig. 47 ), in dorsal view, apophysis with basolateral lobe rounded, relatively small; medial margin broadly rounded near base; group of setae on dorsal surface, basally near medial margin and on ventral surface, posterior to basolateral lobe, along lateral margin, except on distal half; distal portion elongate, thin, weakly sigmoid; apex acute. Aedeagus ( Figs 48, 49 ) dorsal apodeme with pair of slender processes, weakly sclerotized basally and membranous apically, slightly sorter than shaft length, directed dorsad; shaft flattened anteroposteriorly; apical portion with pair of lateral processes on apical one-fourth, short, directed dorsally; one short process on anterior surface, near apex of lateral processes; pair of subapical processes on posterior surface, near lateral margins, two times longer than lateral processes, directed ventrally; apex weakly sclerotized. Other characters as in the generic diagnosis (Dai & Dietrich 2015).

Female terminalia. Sternite VII ( Fig. 50 ) with posterolateral angles rounded, not produced posteriorly as far as posterior margin; posterior margin broadly rounded. Pygofer ( Fig. 51 ) with apex subacute. First valvifer ( Fig. 52 ) ca. two times higher than long; anterior and dorsal margins straight; posterior margin slightly rounded. First valvula ( Figs 52, 53 ) ventral margin apex with areolate sculpturing. Second valvula ( Figs 54, 55 ) dorsal margin with very small, rounded and irregular teeth between the median and apical large teeth and near apex. Gonoplac ( Fig. 56 ) with few sparse setae along ventral margin, except near apex. Other characters as in the generic diagnosis (Dai & Dietrich 2015).

Etymology. The specific epithet refers to the five subapical processes of the aedeagus.

Material examined. Holotype male: " Brasil, MT, Nova Ubiratã,\ E.S.E.C. Rio Ronuro ,\ 13.1122°S, 54.4436°W, 330m \ light trap, 11-16.vi.2017, RR\ Cavichioli & AC Domahovski" (DZUP). Paratypes: 36, 4♀: same data of holotype ( DZUP); 26 , 1♀: "Sinop—M. Grosso\ Brasil—X/1975\ M. Alvarenga " ( DZRJ); 26: "Sinop—Mato Grosso\ BR X/1975 \ M. Alvarenga leg." ( MZSP); 56: "Sinop—Mato Grosso\ Brasil X-1975 \ M. Alvarenga leg."( DZUP) .

Remarks. D. pentacorni sp. nov. is similar to D. guianae Freytag, 2018 in lacking a process at the midlength of the ventral margin of the pygofer process, in the absence of a pair of lateral processes arising near the midlength of the adeagal shaft and in the apically tapered adeagal shaft. However the new species can be easily recognized by the hook-shaped apex of the ventral pygofer process and the presence of five processes near the apex of aedeagal shaft. D. pentacorni sp. nov. and D. collosa can be collected in the same locality, however can be distinguished externally by the size and the shape of male sternite VIII. Specimens of D. collosa are slightly smaller than D. pentacorni sp. nov., with total length of males 6.1 to 6.2mm and females, 6.5 to 6.6mm. Males of D. collosa also have the apex of sternite VIII distinctly more acute compared to the new species.

Figures

FIGURES 36–49. Daveyoungana pentacorni sp. nov., male holotype. 36, head and thorax, dorsal view. 37, head and thorax, ventral view. 38, head and thorax, lateral view. 39, forewing. 40–49, male terminalia: 40, sternite VIII, ventral view. 41, pygofer, dorsal view, 42, pygofer and subgenital plate, lateral view. 43, ventral process of pygofer, lateral view. 44, ventral process of pygofer, ventral view. 45, subgenital plate, ventral view. 46, connective, dorsal view. 47, style, dorsal view. 48, aedeagus, lateral view. 49, aedeagus, posterior view. Scale bars: 36–39 = 1.0 mm, 40–42 = 0.5 mm, 43–49 = 0.25 mm.

FIGURES 50–56. Daveyoungana pentacorni sp. nov., female paratype. 50, sternite VII, ventral view. 51, pygofer, lateral view. 52, first valvifer and first valvula, lateral view. 53, apex of first valvula, lateral view. 54, second valvula, lateral view. 55, apex of second valvula, lateral view. 56, gonoplac, lateral view. Scale bars = 0.5mm.

FIGURES 57–62. Holotypes habitus, dorsal view (left) and lateral view (right). 57, 58, Daveyoungana blockeri sp. nov., 59, 60, Daveyoungana longibrachia sp. nov., 61, 62, Daveyoungana pentacorni sp. nov. Scale bars = 1.0 mm.